CBSE Class 8 Answered

Puberty is a process of physical changes by which a child's body matures into an adult body capable of sexual reproduction to enable fertilization. It is initiated by hormonal signals from

Changes which occur only in boys at puberty:

• Growth of hair in other parts of the body like chest and face.
• Body becomes more muscular due to development of muscles.
• The voice deepens or cracks.
• Chest and shoulder broaden.
• Production of male sex hormone testosterone begins.

Changes which occur only in girls at puberty:

• Mammary glands develop.
• The hip broadens.
• Extra fat is deposited in various parts of the body like hips and thighs.
• Menstruation cycle begins.
• Production of female hormones oestrogen and progesterone begins.